<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      let arr = ['tom', 'lee', 'peter']
      //map forEach filter
      arr.map((value, key, arr) => {
        console.log(value)
        console.log(key)
        console.log(arr)
      })
    </script>
  </body>
</html>
